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William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
+1.99%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$29.4B
AUM Growth
+$519M
Cap. Flow
+$281M
Cap. Flow %
0.96%
Top 10 Hldgs %
23.58%
Holding
1,987
New
99
Increased
752
Reduced
666
Closed
108

Top Buys

Rank Stock Value
1
ABNB icon
Airbnb
ABNB
+$45.2M
2
CHWY icon
Chewy
CHWY
+$31.5M
3
U icon
Unity
U
+$23.3M
4
RYAN icon
Ryan Specialty Holdings
RYAN
+$22.4M
5
AMZN icon
Amazon
AMZN
+$21.5M

Top Sells

Rank Stock Value
1
IDXX icon
Idexx Laboratories
IDXX
+$37.7M
2
GD icon
General Dynamics
GD
+$33.5M
3
ECL icon
Ecolab
ECL
+$31.7M
4
JNJ icon
Johnson & Johnson
JNJ
+$20.9M
5
UBER icon
Uber
UBER
+$19.2M

Sector Composition

Rank Sector Weight
1 Technology 26.19%
2 Healthcare 19.81%
3 Financials 11.61%
4 Consumer Discretionary 10.68%
5 Industrials 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
XYLD icon
1926
Global X S&P 500 Covered Call ETF
XYLD
$3.28B
– –
-2,064
Closed -$101K
ZUMZ icon
1927
Zumiez
ZUMZ
$318M
– –
-6,050
Closed -$296K
QQQH
1928
NEOS Nasdaq-100 Hedged Equity Income ETF
QQQH
$386M
– –
-3,700
Closed -$208K
WTPI
1929
WisdomTree Equity Premium Income Fund
WTPI
$503M
– –
-344
Closed -$11K
LGF.B
1930
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
– –
-2,517
Closed -$46K
LGF.A
1931
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
– –
-8,500
Closed -$176K
AY
1932
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
– –
-6,274
Closed -$234K
PETQ
1933
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
– –
-5,308
Closed -$205K
BIG
1934
DELISTED
Big Lots, Inc.
BIG
– –
-3,461
Closed -$228K
VBIV
1935
DELISTED
VBI Vaccines, Inc. New Common Stock (Canada)
VBIV
– –
-901
Closed -$91K
NVTA
1936
DELISTED
Invitae Corporation
NVTA
– –
-6,599
Closed -$223K
PDCE
1937
DELISTED
PDC Energy, Inc.
PDCE
– –
-70
Closed -$3K
TDW.WS.A
1938
DELISTED
Tidewater Inc. Series A Warrants to purchase shares of common stock (expiring July 31, 2023)
TDW.WS.A
$0 ﹤0.01%
43
– –
TDW.WS.B
1939
DELISTED
Tidewater Inc. Series B Warrants to purchase shares of common stock (expiring July 31, 2023)
TDW.WS.B
$0 ﹤0.01%
46
– –
HGEN
1940
DELISTED
HUMANIGEN, INC.
HGEN
– –
-20,000
Closed -$348K
IAA
1941
DELISTED
IAA, Inc. Common Stock
IAA
– –
-3,685
Closed -$201K
COLIW
1942
DELISTED
Colicity Inc. Warrant
COLIW
$0 ﹤0.01%
+300
New +$307
CLVS
1943
DELISTED
Clovis Oncology, Inc.
CLVS
– –
-100,950
Closed -$586K
LOTZ
1944
DELISTED
CarLotz, Inc. Class A Common Stock
LOTZ
– –
-91,919
Closed -$502K
MNDT
1945
DELISTED
Mandiant, Inc. Common Stock
MNDT
– –
-72,528
Closed -$1.47M
XENT
1946
DELISTED
Intersect ENT, Inc
XENT
– –
-29,564
Closed -$505K
TLMD
1947
DELISTED
SOC Telemed, Inc. Class A Common Stock
TLMD
– –
-128,400
Closed -$731K
HRC
1948
DELISTED
HILL-ROM HOLDINGS, INC.
HRC
– –
-6,074
Closed -$690K
CAI
1949
DELISTED
CAI International, Inc.
CAI
– –
-9,806
Closed -$549K
XEC
1950
DELISTED
CIMAREX ENERGY CO
XEC
– –
-3,406
Closed -$247K
75 76 77
78
79

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William Blair & Company's Q3 2021 Portfolio in Review

As of Q3 2021, William Blair & Company held 1,987 positions worth $29.4B, up 1.8% from $28.9B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q3 2021 filing shows 99 new, 752 increased, 666 reduced and 108 closed positions. Its largest new stake was Ryan Specialty Holdings: 709,555 shares worth $24M. The largest sale was Idexx Laboratories, an estimated $37.7M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 26% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q3 2021 buy was Ryan Specialty Holdings: 709,555 shares worth $24M.
  • William Blair & Company added most to Airbnb in Q3 2021, an estimated $45.2M increase.
  • William Blair & Company's biggest Q3 2021 reduction was Idexx Laboratories, cutting an estimated $37.7M.
  • William Blair & Company fully exited Slack Technologies, Inc. in Q3 2021, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.4B portfolio in Q3 2021.
  • William Blair & Company opened 99 new positions and closed 108 in Q3 2021.
  • William Blair & Company's portfolio value rose 1.8% quarter-over-quarter to $29.4B.

Based on William Blair & Company's 13F filing for Q3 2021, filed 12 Nov 2021.